树状结构加减号

src/components/roleTree/index.vue

@@ -25,6 +25,7 @@
                     node-key="id"
                     style="height: 100%; overflow: auto;"
                     class="filter-tree tree-line"
+                    icon-class="icon-tree"
                     @check-change="checkChange"
                     :data="treeData"
                     :props="defaultProps"
@@ -47,6 +48,7 @@
                     node-key="id"
                     style="height: 100%; overflow: auto;"
                     class="filter-tree tree-line"
+                    icon-class="icon-tree"
                     :data="treeData1"
                     :props="defaultProps"
                     @check-change="checkChange2"
@@ -249,6 +251,12 @@
 </script>
 
 <style lang="less" scoped>
+/deep/ .icon-tree {
+  margin: 0 5px 0 10px;
+  position: relative;
+  background: url('~@/assets/images/shangqi/img/tree-add.png');
+  background-size: 100% 100%;
+}
     /deep/.el-tree-node__content {
         padding-left: 0px !important;
     }